burn down

burn down idiom
  1. Completely consume by fire, burn to the ground, as in Their house burned down and they had nowhere to go. [Mid-1800s]
  2. Diminish for lack of fuel, as in The fire will soon burn down. [Late 1800s]

The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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